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r271903 - in /trunk/gcc: ChangeLog testsuite/Ch...
- From: rguenth at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Tue, 04 Jun 2019 09:05:10 -0000
- Subject: r271903 - in /trunk/gcc: ChangeLog testsuite/Ch...
Author: rguenth
Date: Tue Jun 4 09:05:10 2019
New Revision: 271903
URL: https://gcc.gnu.org/viewcvs?rev=271903&root=gcc&view=rev
Log:
2019-06-04 Richard Biener <rguenther@suse.de>
PR middle-end/90726
* tree-chrec.c (chrec_contains_symbols): Add to visited.
(tree_contains_chrecs): Likewise.
(chrec_contains_symbols_defined_in_loop): Move here and avoid
exponential behaivor from ...
* tree-scalar-evolution.c (chrec_contains_symbols_defined_in_loop):
... here.
(expression_expensive_p): Avoid exponential behavior and compute
expanded size, rejecting any expansion.
* tree-ssa-loop-ivopts.c (abnormal_ssa_name_p): Remove.
(idx_contains_abnormal_ssa_name_p): Likewise.
(contains_abnormal_ssa_name_p_1): New helper for walk_tree.
(contains_abnormal_ssa_name_p): Simplify and use
walk_tree_without_duplicates.
* gcc.dg/pr90726.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr90726.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-chrec.c
trunk/gcc/tree-scalar-evolution.c
trunk/gcc/tree-ssa-loop-ivopts.c